US2334650A - Apparatus for deep fat cooking - Google Patents

Description

Nov. 16, 1943. J. T. RUCH APPARATUS FOR DEEP FAT COOKING 6 Sheets-Sheet 1 Filed May 5, 1941 R 3 E a \pzmrizzmr u 3220 E kzmthkmmtou wzE comm.

INVENTOR. J04 w; 7. Rue/1.

Nov. 16, 1943. J. T. RUCH 2,334,650

APPARATUS FOR DEEP FAT COOKING Filed May 5, 1941 y 6 Sheets-Sheet 2 l F .1; g F

. g 52 3 Z r l I I I Q /4'7 f s 1 P 55 f i I49 47 I I (I4- 5 0h I iwEI-fi I? qH H A L H5 H /8 I! I H II II Ill 27 {,3 1|} 8 0 H INVENTOR. Janus 7T Rue/1.

Nov. 16, 1943.

J. 'r. RUCH 2,334,650

APPARATUS FOR DEEP FAT COOKING Filed May 5, 1941 e Sheets-Sheet s INVENTOR. Jz/z ws 7'. Kucw,

Nov. 16, 1943. 2,334,650

APPARATUS FOR DEEP FAT COOKING Filed May 5, 1941 6 Sheets-Sheet 5 Nov. 16, 1943. J. T. RUCH APPARATUS FOR DEEP FAT COOKING Filed May 5, 1941. 6 Sheets-Sheet 6 INVENTOR. JUL/U5 7. Auc'h'.

Patented Nov. 16, 1943 APPARATUS FOR DEEP FAT COOKING Julius T. Ruch, Indianapolis, Ind., assignor to Doughnut Corporation of America, New York,

N. Y., a corporation Application May 5, 1941, Serial No. 391,925 (01. 99-352) 14 Claims.

This invention relates to apparatus for deep fat cooking which is particularly vadapted to the cooking of yeast raised doughnuts and similar products but which may be used for other purposes as well. Certain portions of the apparatus disclosed herein are disclosed and claimed in my prior Patent No.'2,202,602, issued'May 28, 1940.

One object of the present invention is to pro vide apparatus by means of which products to be cooked in deep fat may be cooked in successive batches at predetermined time intervals.

Another object of the invention .is to provide apparatus by means of which the time of cooking may be controlled and may be made uniform for successive batches.

Another object of the invention is to provide apparatus in which the delivery of successive batches is automatically dependent upon the cooking time assigned to the batch and in which the lost time between the removal of one batch of finished product and the introduction of another is reduced to a minimum.

Another object of the invention is to provide apparatus by means of which the raising or proofing and the cooking of yeast raised prodnets are conducted in an automatic'cycle of operation in which the time of proofing and the time of cooking may be accurately and uniformly controlled.

Another object of the invention is to provide apparatus by means .of which the proofing and cooking of successive batches follow each other in automatically predetermined cycles of operation.

In the preferred form of the apparatus disclosed herein there is provided a. deep fat cookingkettle similar to that described inmy prior patent previously mentioned. .A proofing compartment is located adjacent to the kettle and means are provided for transferring batches of articles from the proofing compartment to the kettle. Said means operates automatically in timed relation with the cooking cycle. In the preferred form of apparatus, conveyor means are used without the proofing compartments to move the same in a predetermined path through said compartment and to deliver successive batches of the product toa transfer point from which they may be taken by suitable transfer mechanism to the kettle. Each batch of articles passing through the proofing compartment thus receives uniform treatment irrespective of variations in temperature which may occur in difierent .parts of said compartment. Preferably the transfer mechanism and the conveyor mechanism within the products and different conditions.

proofing compartment are operated by a single power drive which also operates mechanism associated with the kettle for turning the product' and then removing it from the kettle. By this means the operations of all parts of the apparatus occur in timed sequence although some of said operations may be intermittent. A variable speed drive is preferably interposed in the power transmission mechanism so that the timing of the operations may be varied to suit different Means are also provided for varying the proofing time inde pendently.

Other objects and features of the invention will be understood from the accompanying drawings and the following description and claim s;

Fig. 1 is a side view of a preferred form of apparatus embodying the invention with side plates removed to show the interior mechanism in detail. Fig. 2 is a similar view of the end'of the proofing compartment into which the products to be cooked are introduced. Fig. '3 is a plan view of the power transmission mechanism and associated parts. Fig. 4 is-a plan view of a portionof the power transmission mechanism for operating conveyor mechanism within theproofing compartment. Fig. 5 is an elevational view.

of a portion of the mechanism shown in Fig. .3. Fig. 6 is a similar view of another portion of the mechanism used for transferring articles from the proofing compartment to the kettle. Fig.7 is a plan view of the :mechanism shown in .F g. 6. Fig. 8 is an elevational view of mechanism associated with the kettle and showing the kettle section. In this figure the parts are in the position assumed when a batch of articles is received from the proofing compartment. Fig. 9 is a similar view showing the position of parts after the articles have been lowered into the kettle- 10 is .-a similar view showing the position of parts after the articles have been turned. Fig. 1-; ..is a plan view o th ettl a d s o e m hais wi t p rt in h positiqne r p n as to that of Fig. 8. ,12 is ;a perspective riew of the complete apparatus with the side panels in place. Fig. -13 is a plan view of certainelements of the transfer mechanism.

In the preferred form of the invention shown by way of illustration in the drawings there is provided a stationary framework consistingof base members 2 0,-yer t ical members .2 I, horizontal memberspiz and other members not indicated by number. The detailsof the stationary frame.- work are .not importantsince it is apparent that the several operating parts may be supported in ment and a cooking compartment. Referring to Fig. 1, the partition 26 is substantially in the plane of the vertical frame member 21, the proofing compartment being to the right of said member and the cooking compartment'to the left. The cooking compartment extends to the plane which also carries a sprocket 6!.

of the vertical frame member .28, to the left of which there is provided an off-bearing conveyor 29. The end of the proofing compartment to the right in Fig. l'is closed by a panel 30 (Fig. 3) which has been removed in Fig. 2 to show the interior of the proofing compartment in detail. The panel 30is provided with suitable openings through which the product may be placed in the proofing compartment.

Within the cooking compartment there is cated'a deep fat cooking kettle 3| and suitable heaters such asgas burners 32 for maintaining the proper temperature therein. The proofing compartment may also be provided with suitable heaters, not shown, for maintaining a desired temperature.

Power transmission mechanism pulley 36 is mounted on the shaft of said motor and is connected by a belt 31 to a pulley 38 mounted on a jack shaft 39. By operation of the hand wheel 35 the pitch of the pulley 36 may be varied. to change the speed of rotation of the jack shaft 39 in a well known manner. The jack shaft 39' carries a pulley v48 connected by a belt 4| with a pulley 42 mounted on the input shaft of a double reduction gear unit contained in a housing 43. The output shaft of said reduction gear unit carries a gear 44 meshing with a gear 45 carried on a cam shaft 46. Said cam shaft carries a plurality ofcams by means of which the several operations of the apparatus are controlled.

3 Vertical conveyors proofing compartment Within the proofing compartment there are provided a pair of vertically movable conveyors generally indicated by the reference numbers 47 and 48'in Fig. 1. The conveyor 41 consists of vertically arranged sprocket chains 49 on which there are mounted horizontally arranged angle members 58. Two of the sprocket chains 49 with associated angle members 50 are arranged on each side of the compartment. The conveyor 43 the articles to be cooked may be carried. Said pallets are preferably constructed of woven wire mounted on a suitable rigid frame as seen in Fig. '7. The conveyor 48 is similarly constructed, the upper parts of the chains 51 being trained about suitable sprockets and the lower ends being trained about sprockets 56 Referring now to Fig. 3, the camshaft 48 carries an arm 51 in turn carrying a roller 58 adapted to engage suitable recesses and a star Wheel 59. The star wheel 56 is carried on a jack shaft 68 A sprocket chain 62 is trained about the sprocket BI and about a sprocket 63 carried by a horizontal shaft 64 (Fig. 4) The shaft 64 carries bevel gears 65 meshing with bevel gears 65 carried on horizontal shafts 61. The sprockets 56 driving the chains 5| of conveyor 48 are mounted on the shafts 57.

' The shaft 64 also carries a sprocket 68 connectedby a chain 69 to a sprocket '18 carried on a cross sha'ftll. The shaft H is connected by bevel gears 12 to a pair of shafts, 13 on which the sprockets 53'driving the chains 49 of conveyor 4! are mounted.

By means of the construction just described, the'roll'er 58 engages the star Wheel 59 at each revolution of the cam shaft 46. In so doing, it moves the parts a predetermined distance for each such revolution. The directions of movement of each of the shafts and conveyor chains are shown in Fig. 4 by suitable arrows. It will be apparent that'these directions are such that the conveyor 47 moves upwardly and the conveyor 48 moves downwardly. The several sprockets and gears are so proportioned that each movement of the conveyors is through a distance correspondingto the spacing of the angle members 58 and 52.

Upper transfer mechanism Means are provided for transferring the pallets from the conveyor 41 to the conveyor 48 near the upperportion of the proofing compartment and said means may be termed the upper transfer mechanism. The operation of said means is controlled by a cam 14 carried by the cam shaft 46 and engaging a follower 15 carried on the end of a rod 16. The rod 1.6 is slidably mounted in a bearing 11 which is pivotally mounted on a bracket 18. The opposite end of the rod 76 is connected to an arm 19 mounted on a cross shaft 80, at each end of which there is secured an upwardly extending arm 8|. Adjacent the upper end of the proofing compartment (Fig. 2) there are provided a pair of stationary rods 82 on whichithere are mounted slidable members 83 having downwardly extending portions 84 adapted to engage the uppermost of the pallets 55 on the conveyor 41. The slidable members 83 are rigidly connected by a rod 85 and have extending therefrom rods 86 engaging the forked upper ends of the arms 8!. By means of thisconstruction the cam 14 operates the arms 8| once in each revolutionof the cam shaft 46 and moves said arms to the left in Fig. 1. In this movement the slidable members 83 are moved along the stationary shafts 82 and the downwardly extending portions 84 of said members engage the uppermost pallets on the conveyor 41 and transfer the same to the uppermost pair of angle members 520m the conveyor 48,-

The; return movement of the upper transfer mechanism isefiected by means of acounterweight BT'carried by a'cord 88 which is trained about suitablesprockets 89 and 90 and is secured to the bar 05.; The counterweight 81 serves to return the uppentransfer mechanismto normal position and to retain the follower 15 against thecam'I-l. in

The operationof this transfer mechanism-being controlled by the movement of cam shaft may occur at any predetermined time in thecycle of operation when the conveyors 41 and .48 are at rest. v 1 v .L In ,the operation of the apparatus thus far de-. scribed, the pallets 55 carrying. articles to be proofed andcooked are manually placed on the conveyor" 41' at a suitable point near the lower part of said conveyor. ,Said pallets are moved upwardly step by step andas each palletreaches the top of conveyor 41 it is carried by the upper transfer mechanism torthe conveyor '48 and is then moved downwardly on said conveyors step by step. 1 Lower transfer mechanism 'As the pallets reach a transfer position adjacent the lower part of the conveyors 48, they are transferred from said conveyors to a position above the kettle'3l by mechanism which may be termedfthe lower transfer mechanism.

The operation of the lower transfer mechanism is controlled by a cam ,9I mounted on the camshaft 46. Said cam isengaged by a follower 92 which is supported on a Vertically extending rod 93 which is pivotally mounted at its upper end on a portion of the stationary frame of the apparatus, The follower 92 'is connected by a link 94 to a lever 95 which is pivotally mounted at its lower endon a stationary bracket 96. The upper end of the lever 95 has secured thereto a sprocket chain 91., the opposite end of which is partially wrapped around and secured to a sprocket 98. Said sprocket is mounted on a shaft 99 carrying a gear I00 meshing with a gear IOI on a shaft I02. A sprocket I03 is mounted on the shaft I02 and has secured thereto one end of a sprocket'chain' I04. The opposite endof the chain I04 is secured to a slide I05which'isslidably. mounted on a pair of stationary horizontal rods I06. The slide I05 is provided with'upturned fingers I01 adapted toengage one ,of the pallets 55 carried by the angle members 52 of the conveyor 48. Once durin-geach cycle of operation of the cam shaft 46, the conveyor 48 delivers a pallet 55 to the transfer position shown in Fig. 6 in which said pallet is supported slightly above the level of the rods I05. Thereafter the cam 9I operates the mechanism just described to move the slide I05 to the left in Fig. 6. The fingers I01 engage the pallet 55 and move the same through an opening I08 in the partition 20, thus transferring the same from the proofing compartment-to the cooking compartment.

The slide tion by means of a counterweight I09 (Fig. Said counterweight is provided with a sheave I I0 about which there is trained a cord III secured to the stationary frame of the machine at H2 and having its opposite end trained about a'pulley H3 and secured to the slide I05. The counterweight I09 thus maintains a suitable tension on the sprocket chains I04 and 91 and keeps the follower 92 in engagement with the cam 9|. In its retracted position the slide I05 is positioned within the conveyor 41 as best seen inFig'. 2. A suitable stationary guard H4 is mounted in position to prevent the placing of a pallet so as to interfere with the movement of said slide.

I05 is returned to its normal p0si'- Mechanism for placing the product in the kettle and removing the same therefrom? V 7 Within the cooking compartment there iS DIOf vided a stationary framework consisting of vertical angle members I and horizontal members I2I. Said .framework extends downwardly within the kettle 3| and may be supported on the bot-v tom of the kettle and suitably braced from the main framework of the machine. A movable carrier II9 consisting of side plates I22 and end plates I23" and I24 is suitably guided for vertical movement by means of wings I25 adapted to engage the frame members I20 as shown in Fig. 11. The lower edges of the side plates I22 are inturned to provide flanges I 20 to receive the pallets 55 as they are transferred from the'proofing compartment.

The carrier H9 is lowered to placethe product in the kettle and is raised tov remove the product therefrom by means of mechanism controlled by a cam I21 mounted onthe cam shaft 46. Said cam is engaged by'a follower I28 carried on the end of a yoke lever I29 which is pivotally mounted at I30 and extends through a suitable opening in the partition 26 to a point beneath the cooking compartment. The yoke lever I29 is shaped as best seen in Fig. 13 and the forked outer ends I3I carry a horizontal bar I32 each end of which carries a block I33. Each of the blocks I33 has pivotally secured thereto a pair of upwardly extending rods I34, the upper ends of which are pivotally secured to levers I35 inturn pivotally mounted on hangers I36 secured to the horizontal frame members I2I. Links I31 connect the outer ends of the lever I35 to the side plates I22 of the carrier By means of the mechanism just described the cam I21 permits the carrier II9 carrying a pallet 55 to be lowered into the kettle 3I by gravity at a predetermined time in the rotation of cam shaft 46. The kettle 3| is normally filled with melted fat to a level indicated by the broken line I38 in Figs. 8, 9 and 10. As the pallet 55 sinks beneath the surfaceof the fat, the doughnuts or other articles carried thereby float to the surface in the usual manner. At a later time in the rotation of cam shaft the cam I21 operates to lift the pallet carrier II9 to recapture the articles and remove the same from the kettle.

Turning mechanism For turning the articles during cooking there is provided mechanism controlled by a cam. I39 on the cam shaft 40. Said cam is engaged by a follower I40 carried by a lever I4I which is link-connected to a second lever I42 to form a compound linkage (Fig. 1). A rod I43 is pivotally connected to the lever, MI and to a lever I44 which is pivotally mounted on one of the framemembers I20. The lever I44 has an inturned flange I45 (Figs. 9 and 10) adapted to engage the upper end of a lever I45 pivotally mounted at I on the end plate I24 of the carrier II9. A rack I43 is guided by uide members I49 on the plate I24 and the end of said rack is engaged by the lever I46. The rack I48 meshes with 'pinions I50 carried by longitudinal shafts I5I which are journaled in the plates I23 and I24. Each of said shafts has secured thereto a perforated turning blade I52. Adjacent each of the turning blades I52 there is provided a partition I53 secured to the end plates I23 and I24. In the structure disclosed in the drawings,

table I69.

three ofisaid partitions and three-turning blades are provided.

The doughnuts I54 are placed on the pallets as best seen in Fig. 11 with three rows of dough nuts aligned with-the channels formed by. the three partition plates I53 and'the sidejplate' I22 at the bottom of Fig. 11 The space beneath the upper channel of Fig. 1 1 is left vacant. When the carrier IIS is in its upper position as'shown in Fig. 8, the turning blades I52 are inthe'position shown in that figure and the weight, of said blades urges the rack I48 against the lever I46. The upper end of said lever is engaged by a guide member I55 which holds the parts in the position shown. As the carrier H9 is lowered into the kettle 3| the upper end of lever I43 follows the curved lower portion I56 of the guide member I55 and permits the turning blades I52 to be gently lowered into position against the partition plates I53. I

When the carrier has been fully lowered into the kettle the parts assume the position shown in Fig. 9 with the doughnuts floating on the sur-' face of the fat. At asuitable time thereafter the cam I39 operates its associated linkage to lift the lever I44 as shown in Fig. and to press the same against the lever I46. In this movement the turning blades I52 engage the undersurfaces of the doughnuts I54, lift the same over the partitions I53 and deposit each row of doughnuts in the adjacent channel in a reversed position.

At the end of this movement the blades I52 assume the position shown in Fig. 10 and remain in that position with the right-hand end of the rack I48 against a suitable stop throughout the remainder of the cooking period. When the pallet 55 is lifted from th kettle to recapture the doughnuts the right-hand end of the rack I48 strikes a guide member I51 secured to one of the frame members I26 and is moved thereby to return the parts to the position of Fig. 8.

Off-bearing mechanism The off-bearing conveyor 29 may be driven by the motor 33 or by a separate motor as desired. In the drawings a separate motor I58 is shown arranged for driving said conveyor by means of a belt I56 driving a jack shaft I86 connected by a sprocket chain I6I to the drive shaft I62 of said conveyor. The conveyor 29 is preferably of the platform chain type as best shown in Fig. 12. The tail shaft I 63 thereof carries a sprocket I64 adapted to engage the meshes of the pallets 55 and to lower the same gently down a guideway I55 to a suitable receptacle or return conveyor.

The pallets 55 are provided with upturned portions I 68 formed on the rims thereof so that they have sufficient effective thickness to prevent one pallet from over-riding the next. As each pallet is moved from the proofing compartment to the flanges I26 of the carrier I I9 it engages the preceding pallet which has just been removed from the kettle and pushes the same from the flanges I26 to the off-bearing conveyor I29. When the outgoing pallet is suificiently engaged by the con veyor I29, it is drawn completely out of the cook ing compartment through a suitable opening in the end panel thereof. The pallet then passes beneath a sweeping blade I61 which is set at an acute angle across the path of the doughnuts and which sweeps the finished product from the pallet to a chute I63 leading to an accumulating 7 w -R sdmd of operation 7 e lithe operation of the apparatus, the dough is out or formed into the desired shape by hand or'by suitable machinery if desired and the individual articles are placed on the pallet arranged-asshown in Fig. 11. At intervals corresponding'to the length of the cycles of operation of' the apparatus a pallet is-placed on the conveyor 41. "The conveyor 41 lifts the pallets step by step to the top of the proofing compartment where they are transferred to the conveyor 48 by the "upper transfer mechanism. On the conveyor 48the' articles are lowered step by step until they reach the transfer position shown in ,Fig. 6; 'The pallets thus follow-a predetermined path through the proofing compartment. The

length-of this path and the speed of movement of the conveyors are properly proportioned so that the dough will be raised or proofed while moving in said path. The pallets are delivered to the transfer station at intervals of time corresponding to one revolution of the cam shaft 46 and as long as the pallets are placed in the proofing compartment at similar intervals of time the articles on each pallet receive exactly the sametreatmentl As soonas' the pallet has reached the transfer station, the lower transfer mechanism shown in Figs. 6 and 7 operates to move the pallet from the proofing compartment to the cooking compartment and to place the same on the flanges I26 of the carrier II9 which at that time is in the upper position shown in Fig. 8., Immediately thereafter the pallet is lowered into the kettle 3| by operation of the cam I2'I. At a predetermined time after the pallet has been lowered, the product is turned by operation of cam I 39 and after a similar period of time cam I21 operates to lift the pallet from the kettle. At or before the latter'event another pallet has reached the transfer station and is then moved into thence-kingcompartment displacing the pallet already therein and moving the same on to the oil-bearing conveyor 29. On said conveyor the articles are removed from the pallet by means of the blade I67 and are transferred to the table-I69. L.

In this cycle of operation the several events take place in timed sequence, depending upon the position and shape of the cams on the shaft 46; The period during which articles are transferred to and from the cooking compartment is made as small as possible and the cooking time largely, determines the time length of a cycle. Thecooking time is'determined by the particular product and the nature of the mix from which it is made and may be varied to suit particular conditions by means of the variable speed drive between the motor 33 and the cam shaft 46. A change in the speed of the cam shaft by manipulation of the variable speed drive necessarily changes thefrequency I I with which pallets are delivered to the transfer station but does not necessarily control the time during which each pallet remains in the proofing compartment.

The proofingti'me is controlled by the position in which thepallets are first placed on the conveyor 47. If a maximum proofing time is required, the pallets are placed on the angle members immediately above .the stationary guardv member .II4. Pallets so placed travel through a maximum path in the proofing compartment, and thus have the maximum proofing time for any given length of .cycle. If shorter proofing periodsare desired, the pallets are initially placed preferred forms, the

at higher points on the conveyor .41 and the proofing period is raised products, a proofing compartment, a deep fat cooking kettle, a carrying device adapted to receive pallets carrying articles to be cooked, mechanism adapted to move said carrying device to lower said pallets into said kettle for cooking said articles and to lift the same therefrom after the lapse of a predetermined cooking period, and conveying means operating in timed relation with the operation of said mechanism and adapted to move pallets fromsaid proofing compartment to said carrying device.

2. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a deep fat cooking kettle, means in said proofing compartment adapted to support pallets carrying articles to b'e co'oked, and transfer mechanism adapted to' remove a pallet from said supporting means and transfer the same to said kettle for cooking the articles carried thereby, said transfer mechanism being automatically operated to transfer pallets successively at predetermined time intervals.

3. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a deep fat cooking kettle, means in said proofing compartment adapted to support pallets carrying articles to be cooked, transfer mechanism adapted to remove a pallet from said supporting means and transfer the same to said kettle for cooking the articles carried thereby, said transfer mechanism being automatically operated to transfer pallets successively at predetermined time intervals, and a variable speed power drive operating said transfer mechanism, by variation of the speed of which the duration of said time intervals may be controlled.

4. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a deep fat cooking kettle, means in said proofing compartment adapted to support pal ets carrying articles to be cooked, and transfer mechanism adapted to remove a pallet from said supporting means and transfer the same to said kettle for cooking the articles carried thereby, said transfer mechanism being automatically and intermittently operated to transfer pallets successively at predetermined time intervals.

5. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a deep fat cooking kettle, movable means adapted to move a plurality of article carrying pallets in a predetermined path in said proofing compartment and to bring the same to a transfer station successively and at predetermined time intervals, and transfer mechanism operating in timed relation with the operation of said movable means and adapted to transfer pallets from said transfer station to said kettle for cooking the articles carried thereby.

6. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a deep fat cooking kettle, movable means adapted to move a plurality of article carrying pallets in a predetermined path in said proofing compartment and to bring the same to a transfer station successively and at predetermined time in- 'tervals, transfer mechanism" operating in timed fat coo-kingkettle a carrying devi'ce'adapted to receive pallets carrying articles to be cooked,

mech'anisma dapted to move said carrying device to lower said pallets into said kettle for cooking said articles and to lift the same therefrom'after the lapse of a predetermined cooking period, movable means adapted to move a plurality of article carrying pallets in a predeterminedpath in said proofing compartment and to bring the same to a transfer station successively and at predetermined time intervals, and conveyor means operable to transfer pallets from said transfer point to said carrying device.

8. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a deep fat cooking kettle, a carrying device adapted to receive pallets carrying articles to be cooked, mechanism adapted to move said carrying device to lower said pallets into said kettle for cooking said articles and tolift the same therefrom after the lapse of a predetermined cooking period, movable means adapted to move a plurality of article carrying pallets in a predetermined path in said proofing compartment and to bring thesame to a transferstation successively and at predetermined time intervals, conveyor means operable to transfer pallets from said transfer point to said carrying device, and a single power drive operating said carrying device, said movable means and said conveyor means, whereby timed relation between their operations is maintained.

9. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a deep fat cooking kettle, movable means adapted to move a plurality of article carrying pallets at a predetermined speed from a receiving station through a predetermined path in said proofing compartment and to deliver said pallets successively to a transfer station, and transfer mechanism operating in timed relation with the operation of said movable means and adapted to transfer pallets from said transfer station to said kettle for cooking the articles carried thereby.

10. In. apparatus for deep fat cooking of yeast raised products, a proofing compartment, a pair of vertically movable conveyors in said proofing compartment, one of said conveyors being adapted to receive pallets carrying articles to be cooked and to move the same upwardly from a receiving station, and the other of said conveyors being adapted to move said pallets downwardly to a transfer station, and transfer mechanism adapted to transfer said pallets from the first of said conveyors to the second in the upper portion of said proofing compartment.

11. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a pair of vertically movable conveyors in said proofing compartment, one of said conveyors being adapted to receive pallets carrying articles to be cooked and to move the same upwardly from a receiving station, and the other of said conveyors being adapted to move said'pallets downwardly to a transfer station, transfer mechanism adapted to transfer said pallets from the first of said conveyors to the second in the upper portion of said proofing compartment, and other transfer mechanism adapted to move said pallets from vsaid transfer station to a point outside of said proofing compartment.

12. In apparatus for deep fat cooking of yeast raised products, a proofing compartment, a pair of vertically movable conveyors in said-proofing compartment, one of said conveyors being adapted to receive pallets carrying articles tobe cooked and to move the sameupwardly from a receiving station, and the other of said conveyors being adapted to move said pallets downwardly to a transfer station, transfer mechanism adapted to transfer said pallets from the first of said conveyors to the second in the upper portion of said proofing compartment, a deep fat cooking kettle, and conveying means adapted to move said pallets from said transfer station to said kettle for cooking the articles carried thereby.

13. In apparatus for deep fat cooking, a deep fat cooking kettle, a carrying device adapted to receive pallets carrying the articles to be cooked, mechanism adapted to move said carrying device vertically to lower the pallet carried thereby downwardlyinto said kettle for: cooking said articles and lift said pallet upwardly therefrom after the lapse of a predetermined cooking period, and conveying means movable in timed relation to the operation of said mechanism operable exteriorly of said kettle to transfer said pallets to said carrying device. v

14. In apparatus for deep fat cooking, a deep fat cooking kettle, a movable conveyor on the intake side of said kettle, a movable conveyor on the out-put side of said kettle, said conveyors being operable exteriorly thereof, means for driving said conveyors, a carrying device intermediate said conveyors adapted to receive pallets carrying the articles to be cooked, mechanism adapted to move said carrying device vertically to lower said pallets downwardly into said kettle for cooking said articles and lift the same upwardly therefrom after a lapse of a predetermined cooking period, means for transferring said pallets from the first-mentioned conveyor to said carrying device, and means for operating said transfer means in timed relation therewith, said second-mentioned conveyor being operable to receive and convey from said kettle the pallet lifted therefrom after the cooking period.

JULIUS T. RUCH.

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